package com.example.demo.controller;

import com.example.demo.controller.requests.AddDrinkRequest;
import com.example.demo.controller.requests.ModifyDrinkRequest;
import com.example.demo.model.Drink;
import com.example.demo.repository.DrinkRepository;
import com.example.demo.service.IDrinkService;
import lombok.extern.slf4j.Slf4j;
import org.joda.money.CurrencyUnit;
import org.joda.money.Money;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.http.HttpRequest;
import org.springframework.http.MediaType;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.validation.Valid;
import java.io.*;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

@Slf4j
@RestController
@RequestMapping("/drink")
public class DrinkController {
    @Autowired
    private IDrinkService drinkService;
    // get /drink/
//    @RequestMapping(value = "/",method = RequestMethod.GET)
    @GetMapping("/")
    public List<Drink> getAll(Integer page,Integer limit){
        PageRequest pageRequest=PageRequest.of(page-1,limit);
        // mock数据 - 后期从数据库查询
        List<Drink> results=drinkService.getAllDrinks(pageRequest).getContent();
//                new ArrayList<>();
//        results.add(Drink.builder().id(1)
//                .name("茉莉花茶")
//                .price(Money.parse("USD 8.00"))
//                .build());
//        results.add(Drink.builder().id(2)
//                .name("焦糖拿铁")
//                .price(Money.parse("USD 8.00"))
//                .build());
        return results;
    }

    //日志
    //get /drink/1
    //path路径表示方法 id=1
    @GetMapping("/{id}")
    public Drink getDrink(@PathVariable Integer id){
        log.info("查询饮品的id:{}",id);
        //后期从数据库查询
        //select ... where id=$id
        Drink drink=Drink.builder().id(1)
                .name("茉莉花茶").price(Money.parse("USD 8.00"))
                .build();
        return drink;
    }
   /**
    *新增
    *post /drink/ {"name":"奶茶","price":8.00}
    * 1.直接使用model类接受用户参数
    * 2.编写一个TO类专门负责传值
    */
   @PostMapping("/")
    public Drink addNewDrink(@RequestBody @Valid AddDrinkRequest drink, BindingResult bindingResult){
       if(bindingResult.hasErrors()){
           for (ObjectError error : bindingResult.getAllErrors()) {
               log.error(error.toString());
           }
           return null;
       }else {
           log.info("创建新饮品: {}", drink);
           Drink saveDrink=new Drink();
           BeanUtils.copyProperties(drink,saveDrink);

           //后期从数据库查询
           drinkService.addNewDrink(saveDrink,drink.getCategoryId());
//           Drink Drink1 = Drink.builder().id(1)
//                   .name("茉莉花茶").price(Money.parse("USD 8.00"))
//                   .build();
           return saveDrink;
       }
    }
    /**
     * 修改
     * put /drink/ {"id":1,"name":"新奶茶","price":10.0}
     */
    @PutMapping("/")
    public Drink modifyDrink(@RequestBody ModifyDrinkRequest request){
        log.info("要修改的饮品：{}",request);
        //后期从数据库查询
        //1.通过id查询饮品
        Drink addDrink=drinkService.getDrinkById(request.getId());
        //2.复制前端需要修改的属性
        BeanUtils.copyProperties(request,addDrink);
        //3.更新数据库
        drinkService.updateDrink(addDrink);
//        Drink addDrink=Drink.builder().id(1)
//                .name("茉莉花茶").price(Money.parse("USD 8.00"))
//                .build();
        return addDrink;
    }
    /**
     * 删除
     * delete /drink/1
     */
    @DeleteMapping("/{id}")
    public String deleteDrink(@PathVariable Integer id){
        log.info("要删除的饮品id: {}",id);
        drinkService.deleteDrinkById(id);
        return "删除成功";
    }
    /**
     *文件上传
     * 前端必须使用html form
     * 前端类型必须设置为multipart/form-data
    */
    @PostMapping(value = "/upload",consumes = {MediaType.MULTIPART_FORM_DATA_VALUE})
    public String uploadFile(MultipartFile file){
        String dest="H:/upload/";
        String destFileName=dest+file.getOriginalFilename();
        File destFile=new File(destFileName);
        try {
            file.transferTo(destFile);
        } catch (IOException e) {
            e.printStackTrace();
            return "上传失败";
        }
        return "上传成功";
    }
    /**
     * 批量创建饮品
     *
     */
    @PostMapping(value = "/batch",
            consumes = {MediaType.MULTIPART_FORM_DATA_VALUE})
    public List<Drink> batchAddNewDrink(MultipartFile file) {
        List<Drink> results = new ArrayList<>();
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    file.getInputStream()));
            String line = "";
            while ((line = reader.readLine())!=null) {
                // 解析一行
                String[] args = line.split(",");
                Drink drink = Drink.builder()
                        .id(Integer.parseInt(args[0]))
                        .name(args[1])
                        .price(Money.of(CurrencyUnit.of("CNY"), Double.parseDouble(args[2])))
                        .build();
                results.add(drink);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return results;
    }
}
